Manufacture of printers&#39; varnish and ink.



UNITED STATES ALFRED GEORGE WAss,

PATENT UEEICE.

OF LONDON, ENGLAND.

MANUFACTURE OF PRINTERS VARNISH AND INK.

iPEGIFIGATION forming part of Letters Patent No. 716,318, dated December16, 1902..

Application filed October 15, 1901.

lo ctZZ'whont it Wta/y concern:

Be it known that I, ALFRED GEORGEWASS, a subject of the King of GreatBritain and Ireland, and a resident of London, England, have invented acertain new and useful Improvement in the Manufacture of PrintersVarnish and Ink, (for which I have filed an application for BritishPatent No. 6,061, dated March 22, 1901;) and I do hereby declare thefollowing to be a full, clear, and exact description of the same.

This invention relates to the manufacture of printers varnish and ink,its object being to cheapen the production Without prejudice to therequired properties of the product.

' To this end the invention is characterized by the employment as thebasis of the varnish or ink of mineral oil of from .880 to .905 specificgravity, a heavy distillate of the lubricating-oil series, to which therequired viscosity is imparted by rosin in sufficient quantity,dissolved in the oil when sufficiently heated to melt the rosin. Equalquantities, by weight, of the mineral oil and rosin produce a goodprinters varnish or a good printers ink when also associated withlampblack ora suitablepigrnentorcoloring-matter, which may beincorporated and thoroughly mixed with the hot varnish inany suitablemanner, the resultant pulp being ground, if required.

The proportions of the respective ingredients which I preferto use areabout eighteen parts of mineral oil of about .880 specific gravity,about twenty parts of rosin, and if a black printing-ink is required,about five to six parts-of lampblack. Heavy mineral lubrieating-oil ofbetween such specific gravities is of advantage as the basis of suchvarnish or ink over burnt and boiled linseed-oil or crude petroleum orrefined petroleum of the illuminating-oil series in that its specificgravity more nearly approaching that of the body-giving rosin with whichit is associated enables the economic obtainment of a reliable varnishor ink not liable to layer or Serial No. 78,676. (No sp imens.)

separate on account of a wide difference between the specific gravitiesof its constituents and in that it needs a much less proportion of rosinto produce a suitable viscosity and avoids the necessity of using soap,gum-dammar, or other such ingredients, and so cheapens the process ofproduction and the product, and in that the varnish needs a veryconsiderably-reduced proportion of lampblack or coloring-matter to thatrequired by the hitherto-used bases to produce a good printers ink ofgiven quality, thus considerably lessening the cost, While the ink willwork much freer on the block or type, and while itwill not so freely dryor oxidize on the type will more freely do so on paper.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A composition for printers varnish consisting of substantially equalparts of heavy mineral oil of from .880 to .905 specific gravity and ofrosin dissolved therein.

2. A composition for printers ink consisting of substantially equalparts of heavy mineral oil of from .880 to .905 specific gravity, rosindissolved therein and black or coloring-matter.

3. A composition for printers varnish consisting of eighteen parts heavymineral oil of about .880 specific gravity and twenty parts rosindissolved therein, substantially such as set forth.

4. A composition for printers ink consisting of eighteen partsheavymineraloil of about .880 specific gravity, twenty parts rosin dissolvedtherein and five or six parts black or coloring-matter, substantiallysuch as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

ALFRED GEORGE WASS. Witnesses:

CHARLES AUBREY DAY, ALFRED CHARLES DAY.

